solstice disc suite: unmirroring the discs

From: LOEWENTHAL Simon (sloewenthal_at_gemini.edu)
Date: 06/22/04

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    To: "Sun Mangers" <sunmanagers@sunmanagers.org>
Date: Tue, 22 Jun 2004 17:10:49 -0400

    Hi all,

    I have inherited a machine, a Netra with two internal discs, which has all
    partitions mirrored/stripes across the two discs including the root
    partition.

    I want to upgrade the discs to a greater capacity. I would also like to
    break the mirrors and return to a non-Discsuite set-up. Has anyone done
    this afore?

    Regards, Simon.

    Here is some config., info., for those interested:

    df -lh
    Filesystem size used avail capacity Mounted on
    /dev/md/dsk/d0 3.8G 1.3G 2.5G 34% /
    /proc 0K 0K 0K 0% /proc
    fd 0K 0K 0K 0% /dev/fd
    mnttab 0K 0K 0K 0% /etc/mnttab
    /dev/md/dsk/d6 3.8G 47M 3.7G 2% /var
    swap 564M 8K 564M 1% /var/run
    swap 566M 1.8M 564M 1% /tmp
    /dev/md/dsk/d15 12G 8.7G 2.7G 77% /export/astro
    /dev/md/dsk/d9 2.4G 1.4G 960M 60% /export/home
    /dev/md/dsk/d12 12G 8.5G 2.9G 75% /export/local

    ./metadb
            flags first blk block count
         a m p luo 16 1034 /dev/dsk/c0t0d0s7
         a p luo 16 1034 /dev/dsk/c0t1d0s7
    ./metastat
    d0: Mirror
        Submirror 0: d1
          State: Okay
        Submirror 1: d2
          State: Okay
        Pass: 1
        Read option: roundrobin (default)
        Write option: parallel (default)
        Size: 8193584 blocks

    d1: Submirror of d0
        State: Okay
        Size: 8193584 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t0d0s0 0 No Okay

    d2: Submirror of d0
        State: Okay
        Size: 8193584 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t1d0s0 0 No Okay

    d3: Mirror
        Submirror 0: d4
          State: Okay
        Submirror 1: d5
          State: Okay
        Pass: 1
        Read option: roundrobin (default)
        Write option: parallel (default)
        Size: 1050952 blocks

    d4: Submirror of d3
        State: Okay
        Size: 1050952 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t0d0s1 0 No Okay

    d5: Submirror of d3
        State: Okay
        Size: 1050952 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t1d0s1 0 No Okay

    d6: Mirror
        Submirror 0: d7
          State: Okay
        Submirror 1: d8
          State: Okay
        Pass: 1
        Read option: roundrobin (default)
        Write option: parallel (default)
        Size: 8155168 blocks

    d7: Submirror of d6
        State: Okay
        Size: 8155168 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t0d0s3 0 No Okay

    d8: Submirror of d6
        State: Okay
        Size: 8155168 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t1d0s3 0 No Okay

    d9: Mirror
        Submirror 0: d10
          State: Okay
        Submirror 1: d11
          State: Okay
        Pass: 1
        Read option: roundrobin (default)
        Write option: parallel (default)
        Size: 5120304 blocks

    d10: Submirror of d9
        State: Okay
        Size: 5120304 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t0d0s4 0 No Okay

    d11: Submirror of d9
        State: Okay
        Size: 5120304 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t1d0s4 0 No Okay

    d12: Mirror
        Submirror 0: d13
          State: Okay
        Submirror 1: d14
          State: Okay
        Pass: 1
        Read option: roundrobin (default)
        Write option: parallel (default)
        Size: 24578008 blocks

    d13: Submirror of d12
        State: Okay
        Size: 24578008 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t0d0s5 0 No Okay

    d14: Submirror of d12
        State: Okay
        Size: 24578008 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t1d0s5 0 No Okay

    d15: Mirror
        Submirror 0: d16
          State: Okay
        Submirror 1: d17
          State: Okay
        Pass: 1
        Read option: roundrobin (default)
        Write option: parallel (default)
        Size: 24578008 blocks

    d16: Submirror of d15
        State: Okay
        Size: 24578008 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t0d0s6 0 No Okay

    d17: Submirror of d15
        State: Okay
        Size: 24578008 blocks
        Stripe 0:
            Device Start Block Dbase State Hot Spare
            c0t1d0s6 0 No Okay

    Regards,
    Simon. 

    ---
Simon Loewenthal
Gemini Observatory
Information Systems Group
Video 139.229.33.88
Voice +56 51 205610
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